While football fans are eagerly anticipating the Feb. 6 Super Bowl showdown in Dallas, some state officials are gearing up for the big game’s dark side: the surge in human trafficking that tends to accompany major sports and entertainment events. “What we’ve learned is that sexual trafficking, sexual exploitation of children in particular, is all about supply and demand,” says Ernie Allen, president of the National Center for Missing & Exploited Children. With more than 100,000 fans descending on Dallas, that demand is going to be great. There is a “looming potential explosion of human trafficking around the Super Bowl,” says Texas Attorney General Greg Abbott, who is expecting hundreds of girls and women to be brought to the area. . . .